4 * Copyright (C) 1995, 1996 by Volker Lendecke
5 * Modified 1997 Peter Waltenberg, Bill Hawes, David Woodhouse for 2.1 dcache
6 * Modified 1998, 1999 Wolfram Pienkoss for NLS
10 #include <linux/capability.h>
11 #include <linux/compat.h>
12 #include <linux/errno.h>
14 #include <linux/ioctl.h>
15 #include <linux/time.h>
17 #include <linux/mount.h>
18 #include <linux/slab.h>
19 #include <linux/highuid.h>
20 #include <linux/vmalloc.h>
21 #include <linux/sched.h>
23 #include <asm/uaccess.h>
27 /* maximum limit for ncp_objectname_ioctl */
28 #define NCP_OBJECT_NAME_MAX_LEN 4096
29 /* maximum limit for ncp_privatedata_ioctl */
30 #define NCP_PRIVATE_DATA_MAX_LEN 8192
31 /* maximum negotiable packet size */
32 #define NCP_PACKET_SIZE_INTERNAL 65536
35 ncp_get_fs_info(struct ncp_server * server, struct inode *inode,
36 struct ncp_fs_info __user *arg)
38 struct ncp_fs_info info;
40 if (copy_from_user(&info, arg, sizeof(info)))
43 if (info.version != NCP_GET_FS_INFO_VERSION) {
44 DPRINTK("info.version invalid: %d\n", info.version);
47 /* TODO: info.addr = server->m.serv_addr; */
48 SET_UID(info.mounted_uid, server->m.mounted_uid);
49 info.connection = server->connection;
50 info.buffer_size = server->buffer_size;
51 info.volume_number = NCP_FINFO(inode)->volNumber;
52 info.directory_id = NCP_FINFO(inode)->DosDirNum;
54 if (copy_to_user(arg, &info, sizeof(info)))
60 ncp_get_fs_info_v2(struct ncp_server * server, struct inode *inode,
61 struct ncp_fs_info_v2 __user * arg)
63 struct ncp_fs_info_v2 info2;
65 if (copy_from_user(&info2, arg, sizeof(info2)))
68 if (info2.version != NCP_GET_FS_INFO_VERSION_V2) {
69 DPRINTK("info.version invalid: %d\n", info2.version);
72 info2.mounted_uid = server->m.mounted_uid;
73 info2.connection = server->connection;
74 info2.buffer_size = server->buffer_size;
75 info2.volume_number = NCP_FINFO(inode)->volNumber;
76 info2.directory_id = NCP_FINFO(inode)->DosDirNum;
77 info2.dummy1 = info2.dummy2 = info2.dummy3 = 0;
79 if (copy_to_user(arg, &info2, sizeof(info2)))
85 struct compat_ncp_objectname_ioctl
89 compat_caddr_t object_name; /* a userspace data, in most cases user name */
92 struct compat_ncp_fs_info_v2 {
106 struct compat_ncp_ioctl_request {
112 struct compat_ncp_privatedata_ioctl
115 compat_caddr_t data; /* ~1000 for NDS */
118 #define NCP_IOC_GET_FS_INFO_V2_32 _IOWR('n', 4, struct compat_ncp_fs_info_v2)
119 #define NCP_IOC_NCPREQUEST_32 _IOR('n', 1, struct compat_ncp_ioctl_request)
120 #define NCP_IOC_GETOBJECTNAME_32 _IOWR('n', 9, struct compat_ncp_objectname_ioctl)
121 #define NCP_IOC_SETOBJECTNAME_32 _IOR('n', 9, struct compat_ncp_objectname_ioctl)
122 #define NCP_IOC_GETPRIVATEDATA_32 _IOWR('n', 10, struct compat_ncp_privatedata_ioctl)
123 #define NCP_IOC_SETPRIVATEDATA_32 _IOR('n', 10, struct compat_ncp_privatedata_ioctl)
126 ncp_get_compat_fs_info_v2(struct ncp_server * server, struct inode *inode,
127 struct compat_ncp_fs_info_v2 __user * arg)
129 struct compat_ncp_fs_info_v2 info2;
131 if (copy_from_user(&info2, arg, sizeof(info2)))
134 if (info2.version != NCP_GET_FS_INFO_VERSION_V2) {
135 DPRINTK("info.version invalid: %d\n", info2.version);
138 info2.mounted_uid = server->m.mounted_uid;
139 info2.connection = server->connection;
140 info2.buffer_size = server->buffer_size;
141 info2.volume_number = NCP_FINFO(inode)->volNumber;
142 info2.directory_id = NCP_FINFO(inode)->DosDirNum;
143 info2.dummy1 = info2.dummy2 = info2.dummy3 = 0;
145 if (copy_to_user(arg, &info2, sizeof(info2)))
151 #define NCP_IOC_GETMOUNTUID16 _IOW('n', 2, u16)
152 #define NCP_IOC_GETMOUNTUID32 _IOW('n', 2, u32)
153 #define NCP_IOC_GETMOUNTUID64 _IOW('n', 2, u64)
155 #ifdef CONFIG_NCPFS_NLS
156 /* Here we are select the iocharset and the codepage for NLS.
157 * Thanks Petr Vandrovec for idea and many hints.
160 ncp_set_charsets(struct ncp_server* server, struct ncp_nls_ioctl __user *arg)
162 struct ncp_nls_ioctl user;
163 struct nls_table *codepage;
164 struct nls_table *iocharset;
165 struct nls_table *oldset_io;
166 struct nls_table *oldset_cp;
170 if (copy_from_user(&user, arg, sizeof(user)))
174 user.codepage[NCP_IOCSNAME_LEN] = 0;
175 if (!user.codepage[0] || !strcmp(user.codepage, "default"))
176 codepage = load_nls_default();
178 codepage = load_nls(user.codepage);
185 user.iocharset[NCP_IOCSNAME_LEN] = 0;
186 if (!user.iocharset[0] || !strcmp(user.iocharset, "default")) {
187 iocharset = load_nls_default();
189 } else if (!strcmp(user.iocharset, "utf8")) {
190 iocharset = load_nls_default();
193 iocharset = load_nls(user.iocharset);
195 unload_nls(codepage);
201 mutex_lock(&server->root_setup_lock);
202 if (server->root_setuped) {
203 oldset_cp = codepage;
204 oldset_io = iocharset;
208 NCP_SET_FLAG(server, NCP_FLAG_UTF8);
210 NCP_CLR_FLAG(server, NCP_FLAG_UTF8);
211 oldset_cp = server->nls_vol;
212 server->nls_vol = codepage;
213 oldset_io = server->nls_io;
214 server->nls_io = iocharset;
217 mutex_unlock(&server->root_setup_lock);
218 unload_nls(oldset_cp);
219 unload_nls(oldset_io);
225 ncp_get_charsets(struct ncp_server* server, struct ncp_nls_ioctl __user *arg)
227 struct ncp_nls_ioctl user;
230 memset(&user, 0, sizeof(user));
231 mutex_lock(&server->root_setup_lock);
232 if (server->nls_vol && server->nls_vol->charset) {
233 len = strlen(server->nls_vol->charset);
234 if (len > NCP_IOCSNAME_LEN)
235 len = NCP_IOCSNAME_LEN;
236 strncpy(user.codepage, server->nls_vol->charset, len);
237 user.codepage[len] = 0;
240 if (NCP_IS_FLAG(server, NCP_FLAG_UTF8))
241 strcpy(user.iocharset, "utf8");
242 else if (server->nls_io && server->nls_io->charset) {
243 len = strlen(server->nls_io->charset);
244 if (len > NCP_IOCSNAME_LEN)
245 len = NCP_IOCSNAME_LEN;
246 strncpy(user.iocharset, server->nls_io->charset, len);
247 user.iocharset[len] = 0;
249 mutex_unlock(&server->root_setup_lock);
251 if (copy_to_user(arg, &user, sizeof(user)))
255 #endif /* CONFIG_NCPFS_NLS */
257 static long __ncp_ioctl(struct inode *inode, unsigned int cmd, unsigned long arg)
259 struct ncp_server *server = NCP_SERVER(inode);
261 struct ncp_ioctl_request request;
263 void __user *argp = (void __user *)arg;
267 case NCP_IOC_NCPREQUEST_32:
269 case NCP_IOC_NCPREQUEST:
271 if (cmd == NCP_IOC_NCPREQUEST_32) {
272 struct compat_ncp_ioctl_request request32;
273 if (copy_from_user(&request32, argp, sizeof(request32)))
275 request.function = request32.function;
276 request.size = request32.size;
277 request.data = compat_ptr(request32.data);
280 if (copy_from_user(&request, argp, sizeof(request)))
283 if ((request.function > 255)
285 NCP_PACKET_SIZE - sizeof(struct ncp_request_header))) {
288 bouncebuffer = vmalloc(NCP_PACKET_SIZE_INTERNAL);
291 if (copy_from_user(bouncebuffer, request.data, request.size)) {
295 ncp_lock_server(server);
297 /* FIXME: We hack around in the server's structures
298 here to be able to use ncp_request */
300 server->has_subfunction = 0;
301 server->current_size = request.size;
302 memcpy(server->packet, bouncebuffer, request.size);
304 result = ncp_request2(server, request.function,
305 bouncebuffer, NCP_PACKET_SIZE_INTERNAL);
309 result = server->reply_size;
310 ncp_unlock_server(server);
311 DPRINTK("ncp_ioctl: copy %d bytes\n",
314 if (copy_to_user(request.data, bouncebuffer, result))
319 case NCP_IOC_CONN_LOGGED_IN:
321 if (!(server->m.int_flags & NCP_IMOUNT_LOGGEDIN_POSSIBLE))
323 mutex_lock(&server->root_setup_lock);
324 if (server->root_setuped)
327 result = ncp_conn_logged_in(inode->i_sb);
329 server->root_setuped = 1;
331 mutex_unlock(&server->root_setup_lock);
334 case NCP_IOC_GET_FS_INFO:
335 return ncp_get_fs_info(server, inode, argp);
337 case NCP_IOC_GET_FS_INFO_V2:
338 return ncp_get_fs_info_v2(server, inode, argp);
341 case NCP_IOC_GET_FS_INFO_V2_32:
342 return ncp_get_compat_fs_info_v2(server, inode, argp);
344 /* we have too many combinations of CONFIG_COMPAT,
345 * CONFIG_64BIT and CONFIG_UID16, so just handle
346 * any of the possible ioctls */
347 case NCP_IOC_GETMOUNTUID16:
351 SET_UID(uid, server->m.mounted_uid);
352 if (put_user(uid, (u16 __user *)argp))
356 case NCP_IOC_GETMOUNTUID32:
357 if (put_user(server->m.mounted_uid,
361 case NCP_IOC_GETMOUNTUID64:
362 if (put_user(server->m.mounted_uid,
367 case NCP_IOC_GETROOT:
369 struct ncp_setroot_ioctl sr;
372 mutex_lock(&server->root_setup_lock);
373 if (server->m.mounted_vol[0]) {
374 struct dentry* dentry = inode->i_sb->s_root;
377 struct inode* s_inode = dentry->d_inode;
380 sr.volNumber = NCP_FINFO(s_inode)->volNumber;
381 sr.dirEntNum = NCP_FINFO(s_inode)->dirEntNum;
382 sr.namespace = server->name_space[sr.volNumber];
385 DPRINTK("ncpfs: s_root->d_inode==NULL\n");
387 DPRINTK("ncpfs: s_root==NULL\n");
394 mutex_unlock(&server->root_setup_lock);
395 if (!result && copy_to_user(argp, &sr, sizeof(sr)))
400 case NCP_IOC_SETROOT:
402 struct ncp_setroot_ioctl sr;
406 struct dentry* dentry;
408 if (copy_from_user(&sr, argp, sizeof(sr)))
410 mutex_lock(&server->root_setup_lock);
411 if (server->root_setuped)
414 if (sr.volNumber < 0) {
415 server->m.mounted_vol[0] = 0;
416 vnum = NCP_NUMBER_OF_VOLUMES;
420 } else if (sr.volNumber >= NCP_NUMBER_OF_VOLUMES) {
422 } else if (ncp_mount_subdir(server, sr.volNumber,
423 sr.namespace, sr.dirEntNum,
424 &vnum, &de, &dosde)) {
430 dentry = inode->i_sb->s_root;
432 struct inode* s_inode = dentry->d_inode;
435 NCP_FINFO(s_inode)->volNumber = vnum;
436 NCP_FINFO(s_inode)->dirEntNum = de;
437 NCP_FINFO(s_inode)->DosDirNum = dosde;
438 server->root_setuped = 1;
440 DPRINTK("ncpfs: s_root->d_inode==NULL\n");
444 DPRINTK("ncpfs: s_root==NULL\n");
449 mutex_unlock(&server->root_setup_lock);
454 #ifdef CONFIG_NCPFS_PACKET_SIGNING
455 case NCP_IOC_SIGN_INIT:
457 struct ncp_sign_init sign;
460 if (copy_from_user(&sign, argp, sizeof(sign)))
462 ncp_lock_server(server);
463 mutex_lock(&server->rcv.creq_mutex);
465 if (server->sign_wanted) {
466 memcpy(server->sign_root,sign.sign_root,8);
467 memcpy(server->sign_last,sign.sign_last,16);
468 server->sign_active = 1;
470 /* ignore when signatures not wanted */
472 server->sign_active = 0;
474 mutex_unlock(&server->rcv.creq_mutex);
475 ncp_unlock_server(server);
479 case NCP_IOC_SIGN_WANTED:
483 ncp_lock_server(server);
484 state = server->sign_wanted;
485 ncp_unlock_server(server);
486 if (put_user(state, (int __user *)argp))
491 case NCP_IOC_SET_SIGN_WANTED:
495 /* get only low 8 bits... */
496 if (get_user(newstate, (unsigned char __user *)argp))
499 ncp_lock_server(server);
500 if (server->sign_active) {
501 /* cannot turn signatures OFF when active */
505 server->sign_wanted = newstate != 0;
507 ncp_unlock_server(server);
511 #endif /* CONFIG_NCPFS_PACKET_SIGNING */
513 #ifdef CONFIG_NCPFS_IOCTL_LOCKING
514 case NCP_IOC_LOCKUNLOCK:
516 struct ncp_lock_ioctl rqdata;
518 if (copy_from_user(&rqdata, argp, sizeof(rqdata)))
520 if (rqdata.origin != 0)
523 switch (rqdata.cmd) {
526 if (rqdata.timeout == 0)
527 rqdata.timeout = NCP_LOCK_DEFAULT_TIMEOUT;
528 else if (rqdata.timeout > NCP_LOCK_MAX_TIMEOUT)
529 rqdata.timeout = NCP_LOCK_MAX_TIMEOUT;
532 rqdata.timeout = NCP_LOCK_DEFAULT_TIMEOUT; /* has no effect */
538 /* locking needs both read and write access */
539 if ((result = ncp_make_open(inode, O_RDWR)) != 0)
544 if (!S_ISREG(inode->i_mode))
546 if (rqdata.cmd == NCP_LOCK_CLEAR)
548 result = ncp_ClearPhysicalRecord(NCP_SERVER(inode),
549 NCP_FINFO(inode)->file_handle,
552 if (result > 0) result = 0; /* no such lock */
560 case NCP_LOCK_EX: lockcmd=1; break;
561 case NCP_LOCK_SH: lockcmd=3; break;
562 default: lockcmd=0; break;
564 result = ncp_LogPhysicalRecord(NCP_SERVER(inode),
565 NCP_FINFO(inode)->file_handle,
570 if (result > 0) result = -EAGAIN;
573 ncp_inode_close(inode);
576 #endif /* CONFIG_NCPFS_IOCTL_LOCKING */
579 case NCP_IOC_GETOBJECTNAME_32:
581 struct compat_ncp_objectname_ioctl user;
584 if (copy_from_user(&user, argp, sizeof(user)))
586 down_read(&server->auth_rwsem);
587 user.auth_type = server->auth.auth_type;
588 outl = user.object_name_len;
589 user.object_name_len = server->auth.object_name_len;
590 if (outl > user.object_name_len)
591 outl = user.object_name_len;
594 if (copy_to_user(compat_ptr(user.object_name),
595 server->auth.object_name,
599 up_read(&server->auth_rwsem);
600 if (!result && copy_to_user(argp, &user, sizeof(user)))
606 case NCP_IOC_GETOBJECTNAME:
608 struct ncp_objectname_ioctl user;
611 if (copy_from_user(&user, argp, sizeof(user)))
613 down_read(&server->auth_rwsem);
614 user.auth_type = server->auth.auth_type;
615 outl = user.object_name_len;
616 user.object_name_len = server->auth.object_name_len;
617 if (outl > user.object_name_len)
618 outl = user.object_name_len;
621 if (copy_to_user(user.object_name,
622 server->auth.object_name,
626 up_read(&server->auth_rwsem);
627 if (!result && copy_to_user(argp, &user, sizeof(user)))
633 case NCP_IOC_SETOBJECTNAME_32:
635 case NCP_IOC_SETOBJECTNAME:
637 struct ncp_objectname_ioctl user;
642 size_t oldprivatelen;
645 if (cmd == NCP_IOC_SETOBJECTNAME_32) {
646 struct compat_ncp_objectname_ioctl user32;
647 if (copy_from_user(&user32, argp, sizeof(user32)))
649 user.auth_type = user32.auth_type;
650 user.object_name_len = user32.object_name_len;
651 user.object_name = compat_ptr(user32.object_name);
654 if (copy_from_user(&user, argp, sizeof(user)))
657 if (user.object_name_len > NCP_OBJECT_NAME_MAX_LEN)
659 if (user.object_name_len) {
660 newname = memdup_user(user.object_name,
661 user.object_name_len);
663 return PTR_ERR(newname);
667 down_write(&server->auth_rwsem);
668 oldname = server->auth.object_name;
669 oldnamelen = server->auth.object_name_len;
670 oldprivate = server->priv.data;
671 oldprivatelen = server->priv.len;
672 server->auth.auth_type = user.auth_type;
673 server->auth.object_name_len = user.object_name_len;
674 server->auth.object_name = newname;
675 server->priv.len = 0;
676 server->priv.data = NULL;
677 up_write(&server->auth_rwsem);
684 case NCP_IOC_GETPRIVATEDATA_32:
686 case NCP_IOC_GETPRIVATEDATA:
688 struct ncp_privatedata_ioctl user;
692 if (cmd == NCP_IOC_GETPRIVATEDATA_32) {
693 struct compat_ncp_privatedata_ioctl user32;
694 if (copy_from_user(&user32, argp, sizeof(user32)))
696 user.len = user32.len;
697 user.data = compat_ptr(user32.data);
700 if (copy_from_user(&user, argp, sizeof(user)))
703 down_read(&server->auth_rwsem);
705 user.len = server->priv.len;
706 if (outl > user.len) outl = user.len;
709 if (copy_to_user(user.data,
714 up_read(&server->auth_rwsem);
718 if (cmd == NCP_IOC_GETPRIVATEDATA_32) {
719 struct compat_ncp_privatedata_ioctl user32;
720 user32.len = user.len;
721 user32.data = (unsigned long) user.data;
722 if (copy_to_user(argp, &user32, sizeof(user32)))
726 if (copy_to_user(argp, &user, sizeof(user)))
733 case NCP_IOC_SETPRIVATEDATA_32:
735 case NCP_IOC_SETPRIVATEDATA:
737 struct ncp_privatedata_ioctl user;
743 if (cmd == NCP_IOC_SETPRIVATEDATA_32) {
744 struct compat_ncp_privatedata_ioctl user32;
745 if (copy_from_user(&user32, argp, sizeof(user32)))
747 user.len = user32.len;
748 user.data = compat_ptr(user32.data);
751 if (copy_from_user(&user, argp, sizeof(user)))
754 if (user.len > NCP_PRIVATE_DATA_MAX_LEN)
757 new = memdup_user(user.data, user.len);
763 down_write(&server->auth_rwsem);
764 old = server->priv.data;
765 oldlen = server->priv.len;
766 server->priv.len = user.len;
767 server->priv.data = new;
768 up_write(&server->auth_rwsem);
773 #ifdef CONFIG_NCPFS_NLS
774 case NCP_IOC_SETCHARSETS:
775 return ncp_set_charsets(server, argp);
777 case NCP_IOC_GETCHARSETS:
778 return ncp_get_charsets(server, argp);
780 #endif /* CONFIG_NCPFS_NLS */
782 case NCP_IOC_SETDENTRYTTL:
786 if (copy_from_user(&user, argp, sizeof(user)))
788 /* 20 secs at most... */
791 user = (user * HZ) / 1000;
792 atomic_set(&server->dentry_ttl, user);
796 case NCP_IOC_GETDENTRYTTL:
798 u_int32_t user = (atomic_read(&server->dentry_ttl) * 1000) / HZ;
799 if (copy_to_user(argp, &user, sizeof(user)))
808 long ncp_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
810 struct inode *inode = filp->f_dentry->d_inode;
811 struct ncp_server *server = NCP_SERVER(inode);
812 uid_t uid = current_uid();
813 int need_drop_write = 0;
817 case NCP_IOC_SETCHARSETS:
818 case NCP_IOC_CONN_LOGGED_IN:
819 case NCP_IOC_SETROOT:
820 if (!capable(CAP_SYS_ADMIN)) {
826 if (server->m.mounted_uid != uid) {
829 * Only mount owner can issue these ioctls. Information
830 * necessary to authenticate to other NDS servers are
833 case NCP_IOC_GETOBJECTNAME:
834 case NCP_IOC_SETOBJECTNAME:
835 case NCP_IOC_GETPRIVATEDATA:
836 case NCP_IOC_SETPRIVATEDATA:
838 case NCP_IOC_GETOBJECTNAME_32:
839 case NCP_IOC_SETOBJECTNAME_32:
840 case NCP_IOC_GETPRIVATEDATA_32:
841 case NCP_IOC_SETPRIVATEDATA_32:
846 * These require write access on the inode if user id
847 * does not match. Note that they do not write to the
848 * file... But old code did mnt_want_write, so I keep
849 * it as is. Of course not for mountpoint owner, as
850 * that breaks read-only mounts altogether as ncpmount
851 * needs working NCP_IOC_NCPREQUEST and
852 * NCP_IOC_GET_FS_INFO. Some of these codes (setdentryttl,
853 * signinit, setsignwanted) should be probably restricted
854 * to owner only, or even more to CAP_SYS_ADMIN).
856 case NCP_IOC_GET_FS_INFO:
857 case NCP_IOC_GET_FS_INFO_V2:
858 case NCP_IOC_NCPREQUEST:
859 case NCP_IOC_SETDENTRYTTL:
860 case NCP_IOC_SIGN_INIT:
861 case NCP_IOC_LOCKUNLOCK:
862 case NCP_IOC_SET_SIGN_WANTED:
864 case NCP_IOC_GET_FS_INFO_V2_32:
865 case NCP_IOC_NCPREQUEST_32:
867 ret = mnt_want_write_file(filp);
871 ret = inode_permission(inode, MAY_WRITE);
876 * Read access required.
878 case NCP_IOC_GETMOUNTUID16:
879 case NCP_IOC_GETMOUNTUID32:
880 case NCP_IOC_GETMOUNTUID64:
881 case NCP_IOC_GETROOT:
882 case NCP_IOC_SIGN_WANTED:
883 ret = inode_permission(inode, MAY_READ);
888 * Anybody can read these.
890 case NCP_IOC_GETCHARSETS:
891 case NCP_IOC_GETDENTRYTTL:
893 /* Three codes below are protected by CAP_SYS_ADMIN above. */
894 case NCP_IOC_SETCHARSETS:
895 case NCP_IOC_CONN_LOGGED_IN:
896 case NCP_IOC_SETROOT:
900 ret = __ncp_ioctl(inode, cmd, arg);
903 mnt_drop_write(filp->f_path.mnt);
909 long ncp_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
913 arg = (unsigned long) compat_ptr(arg);
914 ret = ncp_ioctl(file, cmd, arg);